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Q.

The nuclear reaction H 11 + H 11 = He 24 (mass of deuteron = 2.0141 a.m.u. and mass of He = 4.0024 a.m.u.) is

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a

Fusion reaction absorbing 24 MeV energy

b

Fission reaction releasing 0.0258 MeV energy

c

Fission reaction absorbing 0.0258 MeV energy

d

Fusion reaction releasing 24 MeV energy

answer is A.

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Detailed Solution

Total mass of reactants

= (2.0141) x 2 = 4.0282 amu

Total mass of products = 4.0024 amu

Mass defect = 4.0282 amu — 4.0024 amu

                         = 0.0258 amu

Energy released E = 931 x 0.0258= 24 MeV

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